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A058439
Numbers k such that k^2 contains only digits {0,4,7}, not ending with zero.
1
2, 88, 638, 2010988315424552
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..4.
P. De Geest,
Index to related sequences
Hisanori Mishima,
Sporadic tridigital solutions
CROSSREFS
Cf.
A058440
.
Sequence in context:
A244386
A273520
A066226
*
A058463
A364974
A166848
Adjacent sequences:
A058436
A058437
A058438
*
A058440
A058441
A058442
KEYWORD
nonn
,
base
,
hard
,
more
AUTHOR
Patrick De Geest
, Nov 15 2000
STATUS
approved
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Last modified April 25 13:02 EDT 2024. Contains 371969 sequences. (Running on oeis4.)